For lovers of real estate, iOS app House Safari provides a great tool for recording likes and dislikes of neighboring homes.

The app is billed as "Yelp for houses."

While available everywhere, House Safari has active users in Seattle, Palo Alto, Boston, Austin and Chicago.

Some may say standing outside your neighbor’s house to review their landscaping, house color and comment on their dog’s bathroom habits is a bit nosey. But let’s not kid ourselves — we’ve been doing it for years. Why do you think Nextdoor is so popular?